The crossword solution for the term CLEAR, AS A CLOUDY WINDSHIELD is DEFOG, which is a five-letter word. Defogging a windshield is a process of removing fog or condensation from the inside of a car's windshield. This is usually done by turning on the car's air conditioning and setting it to the highest temperature and fan speed. This causes the air to circulate and remove the moisture from the windshield, leaving it clear and free of fog.